diff --git a/CInterface/Library/SpeciesLibrary.cpp b/CInterface/Library/SpeciesLibrary.cpp
index c631b6c..a94ae28 100644
--- a/CInterface/Library/SpeciesLibrary.cpp
+++ b/CInterface/Library/SpeciesLibrary.cpp
@@ -9,4 +9,8 @@ export const SpeciesLibrary* CreatureLib_SpeciesLibrary_Construct(size_t initial
 
 export void CreatureLib_SpeciesLibrary_Destruct(const SpeciesLibrary* p) { delete p; }
 
-BASELIBRARY(CreatureLib_SpeciesLibrary, SpeciesLibrary, CreatureSpecies);
\ No newline at end of file
+BASELIBRARY(CreatureLib_SpeciesLibrary, SpeciesLibrary, CreatureSpecies);
+
+export const CreatureSpecies* CreatureLib_SpeciesLibrary_GetById(const SpeciesLibrary* p, uint16_t id) {
+    return p->GetById(id).GetRaw();
+}
\ No newline at end of file
diff --git a/src/Library/BaseLibrary.hpp b/src/Library/BaseLibrary.hpp
index 5322d9d..bbcfcf8 100644
--- a/src/Library/BaseLibrary.hpp
+++ b/src/Library/BaseLibrary.hpp
@@ -23,12 +23,12 @@ namespace CreatureLib::Library {
 
         virtual ~BaseLibrary() noexcept { _values.Clear(); }
 
-        inline void Insert(const ArbUt::StringView& key, const T* value) {
+        inline virtual void Insert(const ArbUt::StringView& key, const T* value) {
             AssertNotNull(value)
             _values.GetStdMap().insert({key.GetHash(), std::unique_ptr<const T>(value)});
             _listValues.Append(key);
         }
-        inline void Insert(uint32_t hashedKey, const T* value) {
+        inline virtual void Insert(uint32_t hashedKey, const T* value) {
             AssertNotNull(value)
             _values.GetStdMap().insert({hashedKey, std::unique_ptr<const T>(value)});
             _listValues.Append(hashedKey);
diff --git a/src/Library/SpeciesLibrary.hpp b/src/Library/SpeciesLibrary.hpp
index a92aae3..0cb57e8 100644
--- a/src/Library/SpeciesLibrary.hpp
+++ b/src/Library/SpeciesLibrary.hpp
@@ -9,8 +9,21 @@
 namespace CreatureLib::Library {
     class SpeciesLibrary : public BaseLibrary<CreatureSpecies> {
     private:
+        ArbUt::Dictionary<uint16_t, ArbUt::BorrowedPtr<const CreatureSpecies>> _valuesById;
+
     public:
         SpeciesLibrary(size_t initialCapacity = 32) : BaseLibrary(initialCapacity){};
+
+        void Insert(const ArbUt::StringView& key, const CreatureSpecies* value) override {
+            BaseLibrary::Insert(key, value);
+            _valuesById.Insert(value->GetId(), value);
+        }
+        void Insert(uint32_t hashedKey, const CreatureSpecies* value) override {
+            BaseLibrary::Insert(hashedKey, value);
+            _valuesById.Insert(value->GetId(), value);
+        }
+
+        const ArbUt::BorrowedPtr<const CreatureSpecies>& GetById(uint16_t id) const { return _valuesById[id]; }
     };
 }